How can links in PHP be set to open in a new tab or window?

To set links in PHP to open in a new tab or window, you can add the `target="_blank"` attribute to the anchor tag. This attribute tells the browser to open the link in a new tab or window. By adding this attribute to your PHP-generated links, you can ensure that they open in a new tab or window when clicked.

echo '<a href="https://example.com" target="_blank">Link Text</a>';